Piston-grinding machine



Y nepi., sfrKIES FATENT AOFI-TICE-L crm-ir` rnitKigNa orriinzrrnfiinssonni. l

TofaZZ Lt/Loin 'it may concern.' i

Be. it known. thatflI', OREN PERKINS, a

, citizen of the United States, residing at Fayette,in the countyofHoward and State of Missouri, have invented anew aiidusefulPiston-Grinding'Machine, of which the following is a specification.

This invention relates to devices known as grinding machines, and moreparticularly to Aa grinding machine especially designed for grindingover-sized pistons. D

The primary object of the invention is toprovide a machineof thischaracter which may be moved to operate on the cylinder, while thecylinder is mounted on the chassis of a motor vehicle, thus eliminatingthe necessity of removing the cylinder block, to accomplish the grindingof the piston. @A further object of the invention is, to provide novelmeans to insure the true grinding of the piston, and. insure'against anyangular or irregular surfaces being produced on the piston or itscylinder.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, may be made within thescope of what is claimed, without de arting from the spirit oftheinvention. ieferring to the drawing: Figure 1 illustrates a sideelevational view of a grinding machine constructed in accordance withthe present invention showing the same as applied tora cylinder block,

the cylinder blockbeing shown in section. f

Fig. 2 illustrates a sectional vdetail view of the connection betweenthe operating shaft and adjusting lever.

Fig. 3 illustrates a plan view of the device.

Referring to the drawing in detail, the device includes a base 5provided with suitable openings to receive the securing bolts 6, bymeans of which the device may be secured to a cylinder block toaccomplish the grinding operation. Connected to the base 5 is a verticalstandard 7, which is provided with a right angled portion 8 formed witha suitable opening to provide a bearing for the rotating shaft 9.

This shaft 9 is relatively long, and is provided with a plurality ofcircumferential grooves 10, the grooves being arranged in 'YPiemon-Gambino MAcHiNE.

' Aspeeiiicaum.off Letteijsvltetent Patented Slept. 27, 1921.nbpii'ationnid october 13,132.0. rserialfire( 416,613.

spaced relation with each other and disposed intermediate the ends oftheshaft, so that the adjusting lever 11 which operates to ad'- j ust theshaft 9, vertically, may be connected to'theshaft9,1at variouspoints,'to lengthen or shorteirthe 'stroke of they shaft 9.

At vthe upper end of the shaft 9 is an i through the medium of thewristy pin 15, sok

that movement of the lshaft 9 will cause a relative movement of thepiston 14 to grind the same within its cylinder.

The adjusting lever 11 has a forked eX- tremity 16, between the forks ofwhich is pivotally supported a collar 17, as by means of the bolts 18,there being provided set screws 19 extending through the collar 17 fromopposite sides thereof, for providing the connection between vtheadjusting lever 11 and the shaft 9, the set screws 19 being howeverdisposed within the grooves 10 so that the connection between the lever11 and shaft 9 will not restrict rotary movement of the shaft 9.

Pivotally supported on the base 5, is a supporting arm 2() which has itsupper eX- tremity disposed between the forks of the adjusting lever 11at a point substantially intermediate the ends thereof, the connectionbetween the arm 20 and lever 11 being made through the pivot pin 21.Thus it will be seen that by rocking the level 11, the shaft 9. may bemoved or reciprocated vertically to cause a corresponding movement ofthe piston 14 within its cylinder.

Upon rotation of the shaft 9, rotary move ment is imparted to the piston14 to accomplish the grinding of the same, it being understood howeverthat in the operation of the device, the lever 11 is operatedsimultaneously with the shaft 9, to cause the piston 14 to take acombined rotary and reciprocating movement to insure the true grindingthereof.

It might be further stated that if it is the setV screws 19 may beremoved, from the groove as shown by Fig. 1 of the drawing,

Aand positioned in one of the upper grooves.

It is to be understood that in the use of the grinding machine, asuitable grinding medium such as poWder or paste is to be employed toresurface the cylinder.

Having thus described the inventionvvhat is claimed as new is: v f

In a grinding machine, a base, a standard having connection with thebase, said standard having a right angled upper eX- tremity, said rightangled upper extremity having an opening providing a bearing, arotatable shaft supported Within the bearing, said shaft having aplurality yof circumferential grooves disposed in spaced relation witheach other, an adjusting lever, a collar having pivotal connection withthe adjusting lever, set screws extending through the collar and havingtheir ends disposed Within va predetermined groove of a shaft to connectthe adjiusting lever and shaft, means for connecting a plston to oneoREN PERKINS,`

g Witnesses J. D; BLACKWELL. v Y RICHARD K. BRIDGES.

